Ethyl 2-Cyano-2-(4-nitrophenylsulfonyloxyimino)acetate-Mediated Lossen Rearrangement: Single-Pot Racemization-Free Synthesis of Hydroxamic Acids and Ureas from Carboxylic Acids
Ethyl 2-cyano-2-(4-nitrophenylsulfonyloxyimino)acetate (4-NBsOXY) mediated Lossenrearrangement and its application for the synthesis of ureas is demonstrated. Required hydroxamic acids for the Lossenrearrangements were synthesized from carboxylic acids using the same reagent. Finally, reaction of an amine with the produced isocyanate resulted in urea. Good yields without racemization were achieved
Amide derivatives of the general formulae Ia and Ib:
are disclosed. Pharmaceutical compositions containing these compounds, and methods for their use, inter alia, for treating and/or preventing gastrointestinal disorders, pain, and pruritus are also disclosed.
Novel macrolides and ketolides having antimicrobial activity
申请人:Sindkhedkar Milind Dattatraya
公开号:US20090247478A1
公开(公告)日:2009-10-01
The present invention provides compounds having antimicrobial activity for preventing and treating diseases caused by microbial infections. Thus, the present invention relates to novel semi-synthetic 11,12-γ lactone macrolides and ketolides having antimicrobial activity, processes for making compounds as well as pharmaceutical compositions containing said compounds as active ingredients and methods of treating microbial infections with the compounds.